diff --git a/python/python/ert_gui/simulation/models/ensemble_smoother.py b/python/python/ert_gui/simulation/models/ensemble_smoother.py
index a8395fd5f9a..3abba2e22d2 100644
--- a/python/python/ert_gui/simulation/models/ensemble_smoother.py
+++ b/python/python/ert_gui/simulation/models/ensemble_smoother.py
@@ -77,7 +77,7 @@ def create_context(self, arguments, prior_context = None):
         fs_manager = self.ert().getEnkfFsManager()
         if prior_context is None:
             sim_fs = fs_manager.getCurrentFileSystem( )
-            target_fs = fs_manager.getFileSystem("smoother-update")
+            target_fs = fs_manager.getFileSystem(arguments["target_case"])
             itr = 0
             mask = arguments["active_realizations"]
         else: